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20121214
20121214
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.c., in a culture known as sumer, the world's first cities emerged. now, a more complex economy required more complex record-keeping. accountants took a ball of clay which they poked inside with the fingers to make a cavity. you know, it's just like a tennis ball of clay or even smaller. and once they had a good cavity, they would put inside tokens, and then a flap would be put on top, and all of this was closed. and we are in pre-writing time. and at that time every sumerian had a seal. and when the stone is pressed onto the surface of the envelope, it leaves then a design which is then the mark of the person or the administration involved. keach: with these seals, up to four parties could sign a transaction. these envelopes could hold several tokens securely. but there was no way to know the contents until accountants began to press the tokens into the clay before dropping them inside. the system quickly evolved. it did not take a long time for these accountants to realize "why should we have this complicated system ?" they could just as well have a ball of clay upon which they would impres
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